prince



No. 615,900. Patented Dec. I3, I898. J. A. PRINCE.

AUTOMATIC STOP ATTACHMENT FOR PAPER EMBDSSING MACHINES. (Appliationfiled Feb. 12. 1898. (N0 Model.)

2 Sheets-Sheet l.

No. 615,900. Patented Dec. 13, I898.

J. A. PRINCE.

AUTOMATIC STOP ATTACHMENT FOR PAPER EMBDSSING MACHINES.

(Application filed Feb. 12, 1898., (No Model.) 2 Sheets-Sheet 2.

NITED STATES PATENT OFFICE.

JOHN A. PRINCE, OF NEW' YORK, N. Y.

AUTOMATIC STOP ATTACHMENT FOR PAPER-EMBOSSING MACHINES.

SPECIFICATION forming part of Letters Patent No. 615,900, dated December13, 1898.

Application filed February 12,1898. Serial No. 670,037. (No model.)

T0 at whom, it may concern.-

Be it known that I, JOHN A. Person, a citizen of the United States, anda resident of New York, in the county and State of New York, haveinvented a new and useful Improvement in Automatic Stop Attachments forPaper-Embossing Machines, of which the following is a specification.

My invention relates to an improvement in automatic stop attachments forpaper-embossin g machines in which the machine is antomatically stoppedby an increased thickness in the paper being fed thereto. The object ofproviding this stop attachment is more particularly to prevent thefeeding of the joined ends of different sheets of the paper to theembossing-roller, the said thickened portion of the paper having atendency to mar the impression-roller and produce inferior work on theremaining paper fed thereto.

A practical embodiment of my invention is represented in. theaccompanying drawings, in which- Figure 1 represents an end view of anembossing-machine with my improved stop attachment applied thereto. Fig.2 is a partial front view of the same. Fig. 3 is a vertical sectionthrough the machine from front to rear in the plane of the line 3 3 ofFig. 2. Fig. 4 is a view of the latch-bar and its adjacent parts, thelatch-bar being shown in full lines engaged with its catch and in dottedlines the position which it assumes when raised by the tripping-arm.Fig. 5 is a view of the same parts, showing the position which theyassume after the latch-bar has been released. Fig. 6 is a verticalcross-section in the plane of the line 6 6 of Fig. 5, and Fig. 7 is adetail View of the tripping-arm-operating cam.

A A designate the side frames of the embossing-machine, between whichare mounted the usual embossing-roller B and impression-roller C. Theserollers are geared together by spur-gears b c, exterior to the sideframe A. The impression-roller B is geared to and rotated by adrive-shaft D, suitably mounted in the machine, which drive-shaft isprovided with a fast or drive pulley d and a loose pulley d. Thedrive-shaft D is rotated by a belt E, running to a source of power; (Notshown.)

A belt-shifter F is mounted to reciprocate upon suitable guide-rods ff,extended outwardly from the side frame A. This beltshifter F is providedwith a suitable loop f which engages the drive-belt E.

A guide-roll G is mounted across the front of the machine in suitablevertically-adjustable bearings g, and a smaller guideroll H is mountedbetween the side frames A A at a point to the rear and slightly belowthe guideroller G.

A roll of paper I is Wound upon a suitable beam 1, which is mounted insuitable supporting-brackets t" on the side frames A A at the front ofthe vertically-adjustable guide-roll G. The paper isled over theguide-roll G, under the guide-roll H, and between the embossing-roller Band the impression-roller C, and from thence partially around the roller0, and is then led from the machine.

The automatic stop attachment which I have provided for stopping themachine when paper of an undue thickness is being fed thereto consistsof the following parts: A roller J is mounted in suitable bearings j onthe side frames A A, the said roller J being located directly above theguide-roller G, the distance between the two rollers being accuratelyadjusted by the raising and lowering of the'said roller G. The distancebetween ,these two rollers is just sufficient to permit the paper of therequired thickness to pass therethrough without engaging the roller J;but the space is so small that if the paper should be increased inthickness, as by the overlapping of two adjacent ends or by wrinkling orfolding of the paper, the roller J would be rotated. A cam K is securedto the end of the shaft of the roller J, exterior to the side frame A. Atripping-arm L is hinged at Zto the side frame A, and at its free endthe said arm is provided with a roller Z, which rests upon the peripheryof the cam K. This cam is preferably provided with a slightly depressedportion lc,within which the roller seats, so that the roller J will notbe caused to rotate unintentionallya s, for instance, by the jar of themachine. A rock-shaft M is mounted in suitable bearings or upon the sideframe A,which shaft is provided with front and rear upwardly-extendedarms m m the arm m being provided with a suitable handle m at its freeend. The free end of the rear arm m is connected with the belt-shifter Fby a connecting-bar m whereby the rocking movement of the shaft M willcause the belt-shifter to shift the belt E from one to the other of thefast and loose pulleys (1 cl on the driveshaft D. A retracting-spring Nextends from the end plate f of the belt-shifter guide to the arm mithetendency of the said spring being to shift the belt E from the fastpulley onto the loose pulley. The belt-shifter F is,

held against the tension of the spring N with the driving-belt inengagement with the fast pulley d by means of a latch-bar O, hinged at oto the upwardly-extended front arm m of the rock-shaft M, whichlatch-bar is provided with a suitable notch 0, which is engaged by acatch P, secured to the front of the side frame A. The latch-bar O isprovided with a lug 0 which rests in close proximity to the top of thetripping-arm L when the latch-bar is held in its locked position.

To positively insure the working of the stop attachment instantaneously,the roller J is flattened along the element of surface normally adjacentto the roller G, as shown at 3', thereby causing the space between thetwo rollers to be decreased immediately after the roller J is started inits movement by the engagement of the thickened portion of the paper,thus insuring the firmer gripping of the paper by the rollers preventingit from slipping therebetween.

The operation of my attachment is as follows: As the paper is being fedto the machine,when a thickened portion thereof passes between therollers G and J the said thickened portion will causethe roller J andits cam K to rotate, thereby swinging the tripping-arm L upwardly, whichin turn will raise the latch-bar O and release it from its catch. Theretracting-sprin g N will rock the shaft M outwardly, thereby causingthe belt-shifter to shift the belt E from the fast pulley (1 onto theloose pulley (Z and cause the machine to stop. After the thickenedportion has been removed, as for instance by cutting it out of thestrip, the machine may be again started by grasping the handle m of thefront arm m" of the rock-shaft M and rocking the shaft inwardly untilthe latch -bar 0 drops into engagement with its catch. By the use ofthis automatic stop attachment the paper which is being fed to theembossing-machine does not have to be watched by an attendant, and theclass of work turned from the machine is much better, for the reasonthat the surface of the impression-roll is not unduly indented bythickened portions of the paper passing between the embossing-roller andthe said impression-roller.

It is evident that the stop attachment as above described may beemployed in connection with other machines than paper-embossingmachines, and it is also evident that changes might be resorted to inthe form and arrangement of the several parts without departing from thespirit and scope of my invention. Hence I do not wish to limit myselfstrictly to the structure herein shown and described; but

What I claim is 1. A stop attachment comprising a normally stationaryroller, a cam carried thereby, a trip-arm engaged with the cam, alatch-bar in position to be engaged by the trippingarm, a belt-shifterand a rock-shaft having one arm connected with the belt-shifter andanother arm connected with the latch-bar whereby the rotary movement ofthe said roller will operate the belt-shifter, substantially as setforth.

2. A stop attachment comprising a roller, a cam carried thereby, atripping-arm engaged by the cam, a latch-bar in position to be engagedby the tripping-arm, a belt-shifter, a rock-shaft having one armconnected to the belt-shifter and another arm connected to thelatch-bar, a spring tending to hold the beltshifter at the limit of itsmovement in one direction and a catch engaging the latch for holding thebelt-shifter at the limit of its movement in the other direction,substantially as set forth.

3. In a stop attachment for paper-embossing machines, a guide-roller, asecond roller mounted in proximity to the first-named roller, stopmechanism under -the control of the said second roller, the said secondroller being flattened along its element of surface normally adjacent tothe first-named roller whereby the space between the two rollers will bedecreased when the second roller is rotated, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname, in pres ence of two witnesses, this 31st day of January, 1898.

JOHN A. PRINCE.

\Vitnesses:

FREDK. HAYNES, EDWARD VIEsER.

